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1/*
2 * include/linux/nfsd/syscall.h
3 *
4 * This file holds all declarations for the knfsd syscall interface.
5 *
6 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
7 */
8
9#ifndef NFSD_SYSCALL_H
10#define NFSD_SYSCALL_H
11
12#include <asm/types.h>
13#ifdef __KERNEL__
14# include <linux/config.h>
15# include <linux/types.h>
16# include <linux/in.h>
17#endif
18#include <linux/posix_types.h>
19#include <linux/nfsd/const.h>
20#include <linux/nfsd/export.h>
21#include <linux/nfsd/nfsfh.h>
22#include <linux/nfsd/auth.h>
23
24/*
25 * Version of the syscall interface
26 */
27#define NFSCTL_VERSION 0x0201
28
29/*
30 * These are the commands understood by nfsctl().
31 */
32#define NFSCTL_SVC 0 /* This is a server process. */
33#define NFSCTL_ADDCLIENT 1 /* Add an NFS client. */
34#define NFSCTL_DELCLIENT 2 /* Remove an NFS client. */
35#define NFSCTL_EXPORT 3 /* export a file system. */
36#define NFSCTL_UNEXPORT 4 /* unexport a file system. */
37/*#define NFSCTL_UGIDUPDATE 5 / * update a client's uid/gid map. DISCARDED */
38/*#define NFSCTL_GETFH 6 / * get an fh by ino DISCARDED */
39#define NFSCTL_GETFD 7 /* get an fh by path (used by mountd) */
40#define NFSCTL_GETFS 8 /* get an fh by path with max FH len */
41
42/*
43 * Macros used to set version
44 */
45#define NFSCTL_VERSET(_cltbits, _v) ((_cltbits) |= (1 << (_v)))
46#define NFSCTL_VERUNSET(_cltbits, _v) ((_cltbits) &= ~(1 << (_v)))
47#define NFSCTL_VERISSET(_cltbits, _v) ((_cltbits) & (1 << (_v)))
48
49#if defined(CONFIG_NFSD_V4)
50#define NFSCTL_VERALL (0x1c /* 0b011100 */)
51#elif defined(CONFIG_NFSD_V3)
52#define NFSCTL_VERALL (0x0c /* 0b001100 */)
53#else
54#define NFSCTL_VERALL (0x04 /* 0b000100 */)
55#endif
56
57/* SVC */
58struct nfsctl_svc {
59 unsigned short svc_port;
60 int svc_nthreads;
61};
62
63/* ADDCLIENT/DELCLIENT */
64struct nfsctl_client {
65 char cl_ident[NFSCLNT_IDMAX+1];
66 int cl_naddr;
67 struct in_addr cl_addrlist[NFSCLNT_ADDRMAX];
68 int cl_fhkeytype;
69 int cl_fhkeylen;
70 unsigned char cl_fhkey[NFSCLNT_KEYMAX];
71};
72
73/* EXPORT/UNEXPORT */
74struct nfsctl_export {
75 char ex_client[NFSCLNT_IDMAX+1];
76 char ex_path[NFS_MAXPATHLEN+1];
77 __kernel_old_dev_t ex_dev;
78 __kernel_ino_t ex_ino;
79 int ex_flags;
80 __kernel_uid_t ex_anon_uid;
81 __kernel_gid_t ex_anon_gid;
82};
83
84/* GETFD */
85struct nfsctl_fdparm {
86 struct sockaddr gd_addr;
87 char gd_path[NFS_MAXPATHLEN+1];
88 int gd_version;
89};
90
91/* GETFS - GET Filehandle with Size */
92struct nfsctl_fsparm {
93 struct sockaddr gd_addr;
94 char gd_path[NFS_MAXPATHLEN+1];
95 int gd_maxlen;
96};
97
98/*
99 * This is the argument union.
100 */
101struct nfsctl_arg {
102 int ca_version; /* safeguard */
103 union {
104 struct nfsctl_svc u_svc;
105 struct nfsctl_client u_client;
106 struct nfsctl_export u_export;
107 struct nfsctl_fdparm u_getfd;
108 struct nfsctl_fsparm u_getfs;
109 /*
110 * The following dummy member is needed to preserve binary compatibility
111 * on platforms where alignof(void*)>alignof(int). It's needed because
112 * this union used to contain a member (u_umap) which contained a
113 * pointer.
114 */
115 void *u_ptr;
116 } u;
117#define ca_svc u.u_svc
118#define ca_client u.u_client
119#define ca_export u.u_export
120#define ca_getfd u.u_getfd
121#define ca_getfs u.u_getfs
122};
123
124union nfsctl_res {
125 __u8 cr_getfh[NFS_FHSIZE];
126 struct knfsd_fh cr_getfs;
127};
128
129#ifdef __KERNEL__
130/*
131 * Kernel syscall implementation.
132 */
133extern int exp_addclient(struct nfsctl_client *ncp);
134extern int exp_delclient(struct nfsctl_client *ncp);
135extern int exp_export(struct nfsctl_export *nxp);
136extern int exp_unexport(struct nfsctl_export *nxp);
137
138extern unsigned int nfsd_versbits;
139
140#endif /* __KERNEL__ */
141
142#endif /* NFSD_SYSCALL_H */